PathophysiologyLSS can be congenital or acquired, and the degenerative acquired form is by far the most common1. Acquired stenosis is thought to result from a cascade of changes initiated by the degeneration of the nucleus pulposus of the intervertebral disc as patients age. Degeneration and atrophy of stabilizing axial musculature, repeated trauma to the axial spine from daily wear and tear, and potential occupational hazards lead to the desiccation of the nucleus and collapse of the disc space.